diff options
author | Ralf Baechle <ralf@linux-mips.org> | 2000-02-24 00:12:35 +0000 |
---|---|---|
committer | Ralf Baechle <ralf@linux-mips.org> | 2000-02-24 00:12:35 +0000 |
commit | 482368b1a8e45430672c58c9a42e7d2004367126 (patch) | |
tree | ce2a1a567d4d62dee7c2e71a46a99cf72cf1d606 /fs/tunnel.c | |
parent | e4d0251c6f56ab2e191afb70f80f382793e23f74 (diff) |
Merge with 2.3.47. Guys, this is buggy as shit. You've been warned.
Diffstat (limited to 'fs/tunnel.c')
-rw-r--r-- | fs/tunnel.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/fs/tunnel.c b/fs/tunnel.c new file mode 100644 index 000000000..8fee49a00 --- /dev/null +++ b/fs/tunnel.c @@ -0,0 +1,50 @@ +/* fs/tunnel.c: utility functions to support VFS tunnelling + + Copyright (C) 1999 Richard Gooch + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this library; if not, write to the Free + Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + + Richard Gooch may be reached by email at rgooch@atnf.csiro.au + The postal address is: + Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia. + + ChangeLog + + 19991121 Richard Gooch <rgooch@atnf.csiro.au> + Created. +*/ +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/ctype.h> +#include <linux/module.h> +#include <linux/fs.h> + + +/*PUBLIC_FUNCTION*/ +struct dentry *vfs_tunnel_lookup (const struct dentry *dentry, + const struct dentry *parent, + const struct dentry *covered) +/* [SUMMARY] Lookup the corresponding dentry in the mounted-over FS. + <dentry> The dentry which is in the overmounting FS. + <parent> The parent of the dentry in the mounted-over FS. This may be NULL. + <covered> The dentry covered by the root dentry of the overmounting FS. + [RETURNS] A dentry on success, else NULL. +*/ +{ + struct dentry *root = dentry->d_sb->s_root; + + if (covered == root) return NULL; + if (parent) return lookup_dentry (dentry->d_name.name, parent, 0); +} /* End Function vfs_tunnel_lookup */ |